PSA Peugeot Citroën has launched a new diesel-electric hybrid system, the ‘HYmotion4’ all-wheel drivetrain, which is destined for “mid-sized and executive” Peugeot and Citroën models scheduled for launch in 2011.
Unveiled at the Paris show in the Peugeot Prologue and Citroën Hypnos concepts, HYmotion4 is claimed to deliver an “unrivalled” combination of driving performance and fuel efficiency. The 200hp powertrain in the Prologue family car achieves up to 68mpg and emits 109g/km of CO2.
The system uses a rear-mounted electric motor to drive the rear wheels while the diesel engine powers the front pair, providing a new type of all-wheel drive.
Citroen said the new technology gives drivers the advantages of all wheel drive, such as increased safety under conditions of reduced grip, without any of the usual drawbacks of increased weight and higher fuel consumption.
HYmotion4 technology is based on a parallel full hybrid design using existing powertrain sub-assemblies. In the engine bay, it combines a two-litre HDi diesel engine with FAP particulate filter, high-power stop-start system, six-speed compact automated manual gearbox plus the high-torque, high-power electric motor mounted at the back.

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By GlobalDataBy 2011, PSA expects to have over a million Peugeot and Citroën vehicles on the road with start-stop systems.